Changes and Additions

Dylan Nelson
  • 23
  • 20 Apr '15

This post will always contain a complete and up-to-date change log. You can enable Notifications on this topic to automatically receive an email for any update.

Chronological change log:

  • 1 June, 2015: Updated the Stellar Circularities, Angular Momenta, Axis Ratios supplementary catalog to include most snapshots of Illustris-1 (13 through 135 for circularities and momenta, 38 through 135 for axis ratios). In addition, a minor bug was fixed which would have previously affected the z=0 values for only a small percentage of subhalos. (update from Shy Genel)
  • 12 November, 2015: Added additional data to the Stellar Mocks: Multi-band Images and SEDs supplementary dataset, for additional redshifts/snapshots of Illustris-1. In particular, z = 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0 (twelve additional redshifts in addition to the data which remains the same for z=0). For each of these redshifts, both rest-frame and redshifted FITS files are available. The corresponding documentation is updated, as is the 'stellar mocks' section of the API reference. (update from Paul Torrey)
  • 11 December, 2015: The units of the Potential field for all four particle types were previously given incorrectly, having omitted a scale factor. The correct units are (km/s)^2/a, and the documentation has been updated. (Note also: Potential not available in DM-only runs).
  • 21 December, 2015: The Stellar Circularities, Angular Momenta, Axis Ratios catalog for Illustris-1 has been updated due to the previous Potential units change. The following fields were incorrect (at z>0 only) and are now fixed: CircAbove07Frac, CircAbove07MinusBelowNeg07Frac, CircTwiceBelow0Frac, and their _allstars versions.
  • 16 March, 2016: A "Subhalo Matching To Dark" catalog for Illustris-1, Illustris-2 and Illustris-3 has been released. This gives, for each subhalo in the full physics box, the matching subhalo in the DM-only run, at the same resolution. See the documentation for more details.
  • 17 March, 2016: The descriptions of the BH_Pressure and BH_U fields (for blackhole particle-level data) in the documentation have been revised for clarity.
  • 18 April, 2016: A new supplementary data catalog "(e) Multi-Redshift Non-Parametric Stellar Morphologies" has been added for Illustris-1, extending the previous "non-parametric morphologies" data which had been available only for z=0. (update from Greg Snyder).
  • 20 May, 2016: The description of the LastStarTime field for tracer particles in the documentation has been revised for clarity.
  • 22 July, 2016: A new set of Stellar Mocks FITS: SEDs (z=0 only) are available, restricted to subhalo stars only. This is in contrast to the previously available "broadband.fits" files which contained all stars in the parent halo within the imaging region. Therefore, all stars not gravitationally bound to the galaxy of interest are excluded in this new data, including any other nearby galaxies. These contain only integrated SEDs, and not broadband images. These are available for subhalos with greater than 500 star particles. (update from Paul Torrey).
  • 21 September, 2016: A new supplementary data catalog "(f) Blackhole Mergers and Details" has been added for all FP runs (Illustris-1, -2 and -3). This includes information on all SMBH mergers and properties at high time resolution, information which was not previously available in any form. See the new data documentation for details. (update from Luke Kelley).
  • 20 Oct, 2016: A new supplementary data catalog "(g) Stellar Assembly" has been added for all FP runs (Illustris-1, -2 and -3). This includes details on the stellar assembly process of all galaxies across all snapshots, focusing on in situ vs. ex situ stellar mass growth, the contribution from star formation before or after infall, the role of major and/or minor mergers and flyby encounters. See the new data documentation for details. (update from Vicente Rodriguez-Gomez).
  • 25 Nov, 2016: A new supplementary data catalog "(i) Halo/galaxy angular momentum and baryon content" has been added for Illustris-1 and Illustris-1-Dark (z=0 snapshot). It includes details on the angular momentum contents, energies, and rotation of the different baryonic components, measured for every halo and galaxy. (update from Jolanta Zjupa).
  • 11 Apr, 2017: A new supplementary data catalog "(h) Photometry, Morphology, Strong-lensing and Dynamics (PMSD)" has been added for Illustris-1 (covering 10 snapshots from z=0.1 to z=1.0). It contains many associated measurements primarily from the strong-lensing perspective. (update from Dandan Xu).
  • 2 June, 2017: New functionality has been added to the web API. Individual fields can now be downloaded from group catalogs, without needing to download the entire catalog. See the API reference documentation under [base]/groupcat-{num}/?{subset_query}. For example, this link downloads just the Illustris-1 z=0 subhalo SFRs.
  • 21 August, 2017: New functionality has been added to the web API. The descendant branch(es) of the SubLink merger tree (i.e. towards lower redshift) can now be obtained for any given halo at any snapshot. See the API reference documentation under [base]/subhalos/{id}/sublink/mdb.hdf5 for details. For example, this link downloads the MDB ("main descendant branch") of the central subhalo of the 10th most massive halo of Illustris-1 at z=2. Because this subhalo lies on the MPB of its z=0 descendant, the return is a single tree branch. Note that if the selected subhalo does not lie on the MPB of its z=0 descendant, then the return is the full descendant merger tree which contains as its first entry the z=0 descendant of this subhalo.
  • 17 October, 2017: A new supplementary data catalog "(j) Mock Deep Field Lightcones (HST, JWST, WFIRST)" has been added for Illustris-1. It contains synthetic deep survey images, in particular three "mock ultra deep fields", each 2.8 arcminutes across, in common wide filters used by HST, as well as in filters expected to be used widely by observers with JWST and WFIRST. See the data documentation for more information. (update from Greg Snyder).
  • 16 November, 2016: The units of the Volume field for gas cells were previously given incorrectly as the reciprocal. The correct units are (ckpc/h)^3, and the documentation has been updated.

Future additions:

  • None planned at this time, get in touch with specific requests.
Dylan Nelson
  • 2 Jun '15

1 June, 2015: Updated the "Stellar Circularities, Angular Momenta, Axis Ratios" supplementary catalog to include most snapshots of Illustris-1 (13 through 135 for circularities and momenta, 38 through 135 for axis ratios). In addition, a minor bug was fixed which would have previously affected the z=0 values for only a small percentage of subhalos. (update from Shy Genel)

Dylan Nelson
  • 12 Nov '15

12 November, 2015: Added additional data to the "Stellar Mocks: Multi-band Images and SEDs" supplementary dataset, for additional redshifts/snapshots of Illustris-1. In particular, z = 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0 (twelve additional redshifts in addition to the data which remains the same for z=0). For each of these redshifts, both rest-frame and redshifted FITS files are available. The corresponding documentation is updated, as is the 'stellar mocks' section of the API reference. (update from Paul Torrey)

Dylan Nelson
  • 1
  • 11 Dec '15

11 December, 2015: The units of the Potential field for all four particle types were previously given incorrectly, having omitted a scale factor. The correct units are (km/s)^2/a, and the documentation has been updated. (Note also: Potential not available in DM-only runs).

Dylan Nelson
  • 21 Dec '15

21 December, 2015: The "Stellar Circularities, Angular Momenta, Axis Ratios" catalog for Illustris-1 has been updated due to the previous Potential units change. The following fields were incorrect (at z>0 only) and are now fixed: CircAbove07Frac, CircAbove07MinusBelowNeg07Frac, CircTwiceBelow0Frac, and their _allstars versions.

Dylan Nelson
  • 1
  • 16 Mar '16

16 March, 2016: A "Subhalo Matching To Dark" catalog for Illustris-1, Illustris-2 and Illustris-3 has been released. This gives, for each subhalo in the full physics box, the matching subhalo in the DM-only run, at the same resolution. See the documentation for more details.

Dylan Nelson
  • 17 Mar '16

17 March, 2016: The descriptions of the BH_Pressure and BH_U fields (for blackhole particle-level data) in the documentation have been revised for clarity.

Dylan Nelson
  • 18 Apr '16

18 April, 2016: A new supplementary data catalog "(e) Multi-Redshift Non-Parametric Stellar Morphologies" has been added for Illustris-1, extending the previous "non-parametric morphologies" data which had been available only for z=0. (update from Greg Snyder).

Dylan Nelson
  • 19 May '16

20 May, 2016: The description of the LastStarTime field for tracer particles in the documentation has been revised for clarity.

Dylan Nelson
  • 22 Jul '16

22 July, 2016: A new set of Stellar Mocks FITS files (z=0 only) are available, restricted to subhalo stars only. This is in contrast to the previously available "broadband.fits" files which contained all stars in the parent halo within the imaging region. Therefore, all stars not gravitationally bound to the galaxy of interest are excluded in this new data, including any other nearby galaxies. These contain only integrated SEDs, and not broadband images. These are available for subhalos with greater than 500 star particles. (update from Paul Torrey).

Dylan Nelson
  • 21 Sep '16

21 September, 2016: A new supplementary data catalog "(f) Blackhole Mergers and Details" has been added for all FP runs (Illustris-1, -2 and -3). This includes information on all SMBH mergers and properties at high time resolution, information which was not previously available in any form. See the new data documentation for details. (update from Luke Kelley).

Dylan Nelson
  • 3
  • 20 Oct '16

20 Oct, 2016: A new supplementary data catalog "(g) Stellar Assembly" has been added for all FP runs (Illustris-1, -2 and -3). This includes details on the stellar assembly process of all galaxies across all snapshots, focusing on in situ vs. ex situ stellar mass growth, the contribution from star formation before or after infall, the role of major and/or minor mergers and flyby encounters. See the new data documentation for details. (update from Vicente Rodriguez-Gomez).

Dylan Nelson
  • 25 Nov '16

25 Nov, 2016: A new supplementary data catalog "(i) Halo/galaxy angular momentum and baryon content" has been added for Illustris-1 and Illustris-1-Dark (z=0 snapshot). It includes details on the angular momentum contents, energies, and rotation of the different baryonic components, measured for every halo and galaxy. (update from Jolanta Zjupa).